The dimension of a cuboidal tin are 30 cm * 40cm * 50 cm find the cost of tin required or making 20 such tins if the cost of tin sheet is ₹20 per sq. m
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area of cuboid =2(lb+bh+lh)
=2(0.30m*0.40m+0.40m*0.50m+0.30m*0.50m)
=2(0.12m^2+0.2m^2+0.15m^2)
=2*0.47m^2
=0.94m^2
area of 20 boxes=0.94m^2*20
=18.8m^2
cost = 18.8m^2*20=376Rs
=2(0.30m*0.40m+0.40m*0.50m+0.30m*0.50m)
=2(0.12m^2+0.2m^2+0.15m^2)
=2*0.47m^2
=0.94m^2
area of 20 boxes=0.94m^2*20
=18.8m^2
cost = 18.8m^2*20=376Rs
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